Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f038f9a361a764ed013447174b7170073f89cbe9
Commit:     f038f9a361a764ed013447174b7170073f89cbe9
Parent:     6b9686211374a9751ae70a95fd1fcfb8c2a80698
Author:     Andi Kleen <[EMAIL PROTECTED]>
AuthorDate: Tue May 8 00:29:55 2007 -0700
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue May 8 11:15:10 2007 -0700

    Add keyboard blink driver
    
    Simple driver that blinks the keyboard LEDs when loaded.  Useful for
    checking that the kernel is still alive or for crashdumping
    
    Signed-off-by: Andi Kleen <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 drivers/misc/Kconfig  |    9 +++++++++
 drivers/misc/Makefile |    1 +
 drivers/misc/blink.c  |   27 +++++++++++++++++++++++++++
 3 files changed, 37 insertions(+), 0 deletions(-)

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index a3c525b..bfb02c1 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -178,4 +178,13 @@ config THINKPAD_ACPI_BAY
 
          If you are not sure, say Y here.
 
+config BLINK
+       tristate "Keyboard blink driver"
+       help
+         Driver that when loaded will blink the keyboard LEDs continuously.
+         This is useful for debugging and for kernels that cannot necessarily
+         output something to the screen like kexec kernels to give the user
+         a visual indication that the kernel is doing something.
+
+
 endmenu
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index e325164..ece6baf 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_IBM_ASM)           += ibmasm/
 obj-$(CONFIG_HDPU_FEATURES)    += hdpuftrs/
 obj-$(CONFIG_MSI_LAPTOP)     += msi-laptop.o
 obj-$(CONFIG_ASUS_LAPTOP)     += asus-laptop.o
+obj-$(CONFIG_BLINK)            += blink.o
 obj-$(CONFIG_LKDTM)            += lkdtm.o
 obj-$(CONFIG_TIFM_CORE)        += tifm_core.o
 obj-$(CONFIG_TIFM_7XX1)        += tifm_7xx1.o
diff --git a/drivers/misc/blink.c b/drivers/misc/blink.c
new file mode 100644
index 0000000..634431c
--- /dev/null
+++ b/drivers/misc/blink.c
@@ -0,0 +1,27 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/jiffies.h>
+
+static void do_blink(unsigned long data);
+
+static DEFINE_TIMER(blink_timer, do_blink, 0 ,0);
+
+static void do_blink(unsigned long data)
+{
+       static long count;
+       if (panic_blink)
+               panic_blink(count++);
+       blink_timer.expires = jiffies + msecs_to_jiffies(1);
+       add_timer(&blink_timer);
+}
+
+static int blink_init(void)
+{
+       printk(KERN_INFO "Enabling keyboard blinking\n");
+       do_blink(0);
+       return 0;
+}
+
+module_init(blink_init);
+
-
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